#include "hal_aes.h"
#include "net.h"
#include <stdint.h>
#include <string.h>
#include <stdio.h>

#define DELAY 0x0F


/*****************************************************************************/
/* Defines:                                                                  */
/*****************************************************************************/
// The number of columns comprising a state in AES. This is a constant in AES. Value=4
#define Nb 4
// The number of 32 bit words in a key.
#define Nk 4
// Key length in bytes [128 bit]
#define keyln 16
// The number of rounds in AES Cipher.
#define Nr 10


uint8_t iv[] =
{
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
};
static uint8_t *in, *out, state[4][4];

// The array that stores the round keys.
static uint8_t RoundKey[176];

// The Key input to the AES Program
static uint8_t *Key;

// The lookup-tables are marked const so they can be placed in read-only storage instead of RAM
// The numbers below can be computed dynamically trading ROM for RAM -
// This can be useful in (embedded) bootloader applications, where ROM is often limited.
static const uint8_t sbox[256] =
{
    //0     1    2      3     4    5     6     7      8    9     A      B    C     D     E     F
    0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5, 0x30, 0x01, 0x67, 0x2b, 0xfe, 0xd7, 0xab, 0x76,
    0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59, 0x47, 0xf0, 0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0,
    0xb7, 0xfd, 0x93, 0x26, 0x36, 0x3f, 0xf7, 0xcc, 0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31, 0x15,
    0x04, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x05, 0x9a, 0x07, 0x12, 0x80, 0xe2, 0xeb, 0x27, 0xb2, 0x75,
    0x09, 0x83, 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0, 0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3, 0x2f, 0x84,
    0x53, 0xd1, 0x00, 0xed, 0x20, 0xfc, 0xb1, 0x5b, 0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf,
    0xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d, 0x33, 0x85, 0x45, 0xf9, 0x02, 0x7f, 0x50, 0x3c, 0x9f, 0xa8,
    0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5, 0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2,
    0xcd, 0x0c, 0x13, 0xec, 0x5f, 0x97, 0x44, 0x17, 0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19, 0x73,
    0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88, 0x46, 0xee, 0xb8, 0x14, 0xde, 0x5e, 0x0b, 0xdb,
    0xe0, 0x32, 0x3a, 0x0a, 0x49, 0x06, 0x24, 0x5c, 0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79,
    0xe7, 0xc8, 0x37, 0x6d, 0x8d, 0xd5, 0x4e, 0xa9, 0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a, 0xae, 0x08,
    0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6, 0xb4, 0xc6, 0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b, 0x8a,
    0x70, 0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e, 0x61, 0x35, 0x57, 0xb9, 0x86, 0xc1, 0x1d, 0x9e,
    0xe1, 0xf8, 0x98, 0x11, 0x69, 0xd9, 0x8e, 0x94, 0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf,
    0x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68, 0x41, 0x99, 0x2d, 0x0f, 0xb0, 0x54, 0xbb, 0x16
};

static const uint8_t rsbox[256] =
{
    0x52, 0x09, 0x6a, 0xd5, 0x30, 0x36, 0xa5, 0x38, 0xbf, 0x40, 0xa3, 0x9e, 0x81, 0xf3, 0xd7, 0xfb,
    0x7c, 0xe3, 0x39, 0x82, 0x9b, 0x2f, 0xff, 0x87, 0x34, 0x8e, 0x43, 0x44, 0xc4, 0xde, 0xe9, 0xcb,
    0x54, 0x7b, 0x94, 0x32, 0xa6, 0xc2, 0x23, 0x3d, 0xee, 0x4c, 0x95, 0x0b, 0x42, 0xfa, 0xc3, 0x4e,
    0x08, 0x2e, 0xa1, 0x66, 0x28, 0xd9, 0x24, 0xb2, 0x76, 0x5b, 0xa2, 0x49, 0x6d, 0x8b, 0xd1, 0x25,
    0x72, 0xf8, 0xf6, 0x64, 0x86, 0x68, 0x98, 0x16, 0xd4, 0xa4, 0x5c, 0xcc, 0x5d, 0x65, 0xb6, 0x92,
    0x6c, 0x70, 0x48, 0x50, 0xfd, 0xed, 0xb9, 0xda, 0x5e, 0x15, 0x46, 0x57, 0xa7, 0x8d, 0x9d, 0x84,
    0x90, 0xd8, 0xab, 0x00, 0x8c, 0xbc, 0xd3, 0x0a, 0xf7, 0xe4, 0x58, 0x05, 0xb8, 0xb3, 0x45, 0x06,
    0xd0, 0x2c, 0x1e, 0x8f, 0xca, 0x3f, 0x0f, 0x02, 0xc1, 0xaf, 0xbd, 0x03, 0x01, 0x13, 0x8a, 0x6b,
    0x3a, 0x91, 0x11, 0x41, 0x4f, 0x67, 0xdc, 0xea, 0x97, 0xf2, 0xcf, 0xce, 0xf0, 0xb4, 0xe6, 0x73,
    0x96, 0xac, 0x74, 0x22, 0xe7, 0xad, 0x35, 0x85, 0xe2, 0xf9, 0x37, 0xe8, 0x1c, 0x75, 0xdf, 0x6e,
    0x47, 0xf1, 0x1a, 0x71, 0x1d, 0x29, 0xc5, 0x89, 0x6f, 0xb7, 0x62, 0x0e, 0xaa, 0x18, 0xbe, 0x1b,
    0xfc, 0x56, 0x3e, 0x4b, 0xc6, 0xd2, 0x79, 0x20, 0x9a, 0xdb, 0xc0, 0xfe, 0x78, 0xcd, 0x5a, 0xf4,
    0x1f, 0xdd, 0xa8, 0x33, 0x88, 0x07, 0xc7, 0x31, 0xb1, 0x12, 0x10, 0x59, 0x27, 0x80, 0xec, 0x5f,
    0x60, 0x51, 0x7f, 0xa9, 0x19, 0xb5, 0x4a, 0x0d, 0x2d, 0xe5, 0x7a, 0x9f, 0x93, 0xc9, 0x9c, 0xef,
    0xa0, 0xe0, 0x3b, 0x4d, 0xae, 0x2a, 0xf5, 0xb0, 0xc8, 0xeb, 0xbb, 0x3c, 0x83, 0x53, 0x99, 0x61,
    0x17, 0x2b, 0x04, 0x7e, 0xba, 0x77, 0xd6, 0x26, 0xe1, 0x69, 0x14, 0x63, 0x55, 0x21, 0x0c, 0x7d
};


// The round constant word array, Rcon[i], contains the values given by
// x to th e power (i-1) being powers of x (x is denoted as {02}) in the field GF(2^8)
// Note that i starts at 1, not 0).
static const uint8_t Rcon[255] =
{
    0x8d, 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36, 0x6c, 0xd8, 0xab, 0x4d, 0x9a,
    0x2f, 0x5e, 0xbc, 0x63, 0xc6, 0x97, 0x35, 0x6a, 0xd4, 0xb3, 0x7d, 0xfa, 0xef, 0xc5, 0x91, 0x39,
    0x72, 0xe4, 0xd3, 0xbd, 0x61, 0xc2, 0x9f, 0x25, 0x4a, 0x94, 0x33, 0x66, 0xcc, 0x83, 0x1d, 0x3a,
    0x74, 0xe8, 0xcb, 0x8d, 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36, 0x6c, 0xd8,
    0xab, 0x4d, 0x9a, 0x2f, 0x5e, 0xbc, 0x63, 0xc6, 0x97, 0x35, 0x6a, 0xd4, 0xb3, 0x7d, 0xfa, 0xef,
    0xc5, 0x91, 0x39, 0x72, 0xe4, 0xd3, 0xbd, 0x61, 0xc2, 0x9f, 0x25, 0x4a, 0x94, 0x33, 0x66, 0xcc,
    0x83, 0x1d, 0x3a, 0x74, 0xe8, 0xcb, 0x8d, 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b,
    0x36, 0x6c, 0xd8, 0xab, 0x4d, 0x9a, 0x2f, 0x5e, 0xbc, 0x63, 0xc6, 0x97, 0x35, 0x6a, 0xd4, 0xb3,
    0x7d, 0xfa, 0xef, 0xc5, 0x91, 0x39, 0x72, 0xe4, 0xd3, 0xbd, 0x61, 0xc2, 0x9f, 0x25, 0x4a, 0x94,
    0x33, 0x66, 0xcc, 0x83, 0x1d, 0x3a, 0x74, 0xe8, 0xcb, 0x8d, 0x01, 0x02, 0x04, 0x08, 0x10, 0x20,
    0x40, 0x80, 0x1b, 0x36, 0x6c, 0xd8, 0xab, 0x4d, 0x9a, 0x2f, 0x5e, 0xbc, 0x63, 0xc6, 0x97, 0x35,
    0x6a, 0xd4, 0xb3, 0x7d, 0xfa, 0xef, 0xc5, 0x91, 0x39, 0x72, 0xe4, 0xd3, 0xbd, 0x61, 0xc2, 0x9f,
    0x25, 0x4a, 0x94, 0x33, 0x66, 0xcc, 0x83, 0x1d, 0x3a, 0x74, 0xe8, 0xcb, 0x8d, 0x01, 0x02, 0x04,
    0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36, 0x6c, 0xd8, 0xab, 0x4d, 0x9a, 0x2f, 0x5e, 0xbc, 0x63,
    0xc6, 0x97, 0x35, 0x6a, 0xd4, 0xb3, 0x7d, 0xfa, 0xef, 0xc5, 0x91, 0x39, 0x72, 0xe4, 0xd3, 0xbd,
    0x61, 0xc2, 0x9f, 0x25, 0x4a, 0x94, 0x33, 0x66, 0xcc, 0x83, 0x1d, 0x3a, 0x74, 0xe8, 0xcb
};


/*****************************************************************************/
/* Private functions:                                                        */
/*****************************************************************************/
FUNC_IN_FLASH static uint8_t getSBoxValue(uint8_t num)
{
    return sbox[num];
}

FUNC_IN_FLASH static uint8_t getSBoxInvert(uint8_t num)
{
    return rsbox[num];
}


// This function produces Nb(Nr+1) round keys. The round keys are used in each round to decrypt the states.
FUNC_IN_FLASH static void KeyExpansion()
{
    uint32_t i, j, k;
    uint8_t tempa[4]; // Used for the column/row operations

    // The first round key is the key itself.
    for(i = 0; i < Nk; ++i)
    {
        RoundKey[(i * 4) + 0] = Key[(i * 4) + 0];
        RoundKey[(i * 4) + 1] = Key[(i * 4) + 1];
        RoundKey[(i * 4) + 2] = Key[(i * 4) + 2];
        RoundKey[(i * 4) + 3] = Key[(i * 4) + 3];
    }

    // All other round keys are found from the previous round keys.
    for(; (i < (Nb * (Nr + 1))); ++i)
    {
        for(j = 0; j < 4; ++j)
        {
            tempa[j] = RoundKey[(i - 1) * 4 + j];
        }
        if (i % Nk == 0)
        {
            // This function rotates the 4 bytes in a word to the left once.
            // [a0,a1,a2,a3] becomes [a1,a2,a3,a0]

            // Function RotWord()
            {
                k = tempa[0];
                tempa[0] = tempa[1];
                tempa[1] = tempa[2];
                tempa[2] = tempa[3];
                tempa[3] = k;
            }

            // SubWord() is a function that takes a four-byte input word and
            // applies the S-box to each of the four bytes to produce an output word.

            // Function Subword()
            {
                tempa[0] = getSBoxValue(tempa[0]);
                tempa[1] = getSBoxValue(tempa[1]);
                tempa[2] = getSBoxValue(tempa[2]);
                tempa[3] = getSBoxValue(tempa[3]);
            }

            tempa[0] =  tempa[0] ^ Rcon[i / Nk];
        }
        else if (Nk > 6 && i % Nk == 4)
        {
            // Function Subword()
            {
                tempa[0] = getSBoxValue(tempa[0]);
                tempa[1] = getSBoxValue(tempa[1]);
                tempa[2] = getSBoxValue(tempa[2]);
                tempa[3] = getSBoxValue(tempa[3]);
            }
        }
        RoundKey[i * 4 + 0] = RoundKey[(i - Nk) * 4 + 0] ^ tempa[0];
        RoundKey[i * 4 + 1] = RoundKey[(i - Nk) * 4 + 1] ^ tempa[1];
        RoundKey[i * 4 + 2] = RoundKey[(i - Nk) * 4 + 2] ^ tempa[2];
        RoundKey[i * 4 + 3] = RoundKey[(i - Nk) * 4 + 3] ^ tempa[3];
    }
}

// This function adds the round key to state.
// The round key is added to the state by an XOR function.
FUNC_IN_FLASH static void AddRoundKey(uint8_t round)
{
    uint8_t i, j;
    for(i = 0; i < 4; i++)
    {
        for(j = 0; j < 4; ++j)
        {
            state[j][i] ^= RoundKey[round * Nb * 4 + i * Nb + j];
        }
    }
}

// The SubBytes Function Substitutes the values in the
// state matrix with values in an S-box.
FUNC_IN_FLASH static void SubBytes()
{
    uint8_t i, j;
    for(i = 0; i < 4; ++i)
    {
        for(j = 0; j < 4; ++j)
        {
            state[i][j] = getSBoxValue(state[i][j]);
        }
    }
}

// The ShiftRows() function shifts the rows in the state to the left.
// Each row is shifted with different offset.
// Offset = Row number. So the first row is not shifted.
FUNC_IN_FLASH static void ShiftRows()
{
    uint8_t temp;

    // Rotate first row 1 columns to left
    temp        = state[1][0];
    state[1][0] = state[1][1];
    state[1][1] = state[1][2];
    state[1][2] = state[1][3];
    state[1][3] = temp;

    // Rotate second row 2 columns to left
    temp        = state[2][0];
    state[2][0] = state[2][2];
    state[2][2] = temp;

    temp = state[2][1];
    state[2][1] = state[2][3];
    state[2][3] = temp;

    // Rotate third row 3 columns to left
    temp = state[3][0];
    state[3][0] = state[3][3];
    state[3][3] = state[3][2];
    state[3][2] = state[3][1];
    state[3][1] = temp;
}

FUNC_IN_FLASH static uint8_t xtime(uint8_t x)
{
    return ((x << 1) ^ (((x >> 7) & 1) * 0x1b));
}

// MixColumns function mixes the columns of the state matrix
FUNC_IN_FLASH static void MixColumns()
{
    uint8_t i;
    uint8_t Tmp, Tm, t;
    for(i = 0; i < 4; ++i)
    {
        t   = state[0][i];
        Tmp = state[0][i] ^ state[1][i] ^ state[2][i] ^ state[3][i] ;
        Tm  = state[0][i] ^ state[1][i] ;
        Tm = xtime(Tm);
        state[0][i] ^= Tm ^ Tmp ;
        Tm  = state[1][i] ^ state[2][i] ;
        Tm = xtime(Tm);
        state[1][i] ^= Tm ^ Tmp ;
        Tm  = state[2][i] ^ state[3][i] ;
        Tm = xtime(Tm);
        state[2][i] ^= Tm ^ Tmp ;
        Tm  = state[3][i] ^ t ;
        Tm = xtime(Tm);
        state[3][i] ^= Tm ^ Tmp ;
    }
}

// Multiplty is a macro used to multiply numbers in the field GF(2^8)
#define Multiply(x,y) (((y & 1) * x) ^ ((y>>1 & 1) * xtime(x)) ^ ((y>>2 & 1) * xtime(xtime(x))) ^ ((y>>3 & 1) * xtime(xtime(xtime(x)))) ^ ((y>>4 & 1) * xtime(xtime(xtime(xtime(x))))))


// MixColumns function mixes the columns of the state matrix.
// The method used to multiply may be difficult to understand for the inexperienced.
// Please use the references to gain more information.
FUNC_IN_FLASH static void InvMixColumns()
{
    int i;
    uint8_t a, b, c, d;
    for(i = 0; i < 4; i++)
    {

        a = state[0][i];
        b = state[1][i];
        c = state[2][i];
        d = state[3][i];


        state[0][i] = Multiply(a, 0x0e) ^ Multiply(b, 0x0b) ^ Multiply(c, 0x0d) ^ Multiply(d, 0x09);
        state[1][i] = Multiply(a, 0x09) ^ Multiply(b, 0x0e) ^ Multiply(c, 0x0b) ^ Multiply(d, 0x0d);
        state[2][i] = Multiply(a, 0x0d) ^ Multiply(b, 0x09) ^ Multiply(c, 0x0e) ^ Multiply(d, 0x0b);
        state[3][i] = Multiply(a, 0x0b) ^ Multiply(b, 0x0d) ^ Multiply(c, 0x09) ^ Multiply(d, 0x0e);
    }
}


// The SubBytes Function Substitutes the values in the
// state matrix with values in an S-box.
FUNC_IN_FLASH static void InvSubBytes()
{
    uint8_t i, j;
    for(i = 0; i < 4; i++)
    {
        for(j = 0; j < 4; j++)
        {
            state[i][j] = getSBoxInvert(state[i][j]);
        }
    }
}


FUNC_IN_FLASH static void InvShiftRows()
{
    uint8_t temp;

    // Rotate first row 1 columns to right
    temp = state[1][3];
    state[1][3] = state[1][2];
    state[1][2] = state[1][1];
    state[1][1] = state[1][0];
    state[1][0] = temp;

    // Rotate second row 2 columns to right
    temp = state[2][0];
    state[2][0] = state[2][2];
    state[2][2] = temp;

    temp = state[2][1];
    state[2][1] = state[2][3];
    state[2][3] = temp;

    // Rotate third row 3 columns to right
    temp = state[3][0];
    state[3][0] = state[3][1];
    state[3][1] = state[3][2];
    state[3][2] = state[3][3];
    state[3][3] = temp;
}


// Cipher is the main function that encrypts the PlainText.
FUNC_IN_FLASH static void Cipher()
{
    uint8_t i, j, round = 0;

    // Copy the input PlainText to state array.
    for(i = 0; i < 4; ++i)
    {
        for(j = 0; j < 4 ; ++j)
        {
            state[j][i] = in[(i * 4) + j];
        }
    }

    // Add the First round key to the state before starting the rounds.
    AddRoundKey(0);

    // There will be Nr rounds.
    // The first Nr-1 rounds are identical.
    // These Nr-1 rounds are executed in the loop below.
    for(round = 1; round < Nr; ++round)
    {
        SubBytes();
        ShiftRows();
        MixColumns();
        AddRoundKey(round);
    }

    // The last round is given below.
    // The MixColumns function is not here in the last round.
    SubBytes();
    ShiftRows();
    AddRoundKey(Nr);

    // The encryption process is over.
    // Copy the state array to output array.
    for(i = 0; i < 4; ++i)
    {
        for(j = 0; j < 4; ++j)
        {
            out[(i * 4) + j] = state[j][i];
        }
    }
}

FUNC_IN_FLASH static void InvCipher()
{
    uint8_t i, j, round = 0;

    // Copy the input CipherText to state array.
    for(i = 0; i < 4; i++)
    {
        for(j = 0; j < 4; j++)
        {
            state[j][i] = in[i * 4 + j];
        }
    }

    // Add the First round key to the state before starting the rounds.
    AddRoundKey(Nr);

    // There will be Nr rounds.
    // The first Nr-1 rounds are identical.
    // These Nr-1 rounds are executed in the loop below.
    for(round = Nr - 1; round > 0; round--)
    {
        InvShiftRows();
        InvSubBytes();
        AddRoundKey(round);
        InvMixColumns();
    }

    // The last round is given below.
    // The MixColumns function is not here in the last round.
    InvShiftRows();
    InvSubBytes();
    AddRoundKey(0);

    // The decryption process is over.
    // Copy the state array to output array.
    for(i = 0; i < 4; i++)
    {
        for(j = 0; j < 4; j++)
        {
            out[i * 4 + j] = state[j][i];
        }
    }
}


/*****************************************************************************/
/* Public functions:                                                         */
/*****************************************************************************/


FUNC_IN_FLASH static void setKey(const uint8_t *key)
{
    Key = (uint8_t *)key;
    KeyExpansion();
}

FUNC_IN_FLASH static void AES128_ECB_encrypt(uint8_t *input, uint8_t *output)
{
    in = input;
    out = output;
    Cipher();
}

FUNC_IN_FLASH static void AES128_ECB_decrypt(uint8_t *input, uint8_t *output)
{
    in = input;
    out = output;
    InvCipher();
}

#define SWAP(x) \
    ((uint32_t)((((uint32_t)(x) & 0xff000000) >> 24) | \
                (((uint32_t)(x) & 0x00ff0000) >>  8) | \
                (((uint32_t)(x) & 0x0000ff00) <<  8) | \
                (((uint32_t)(x) & 0x000000ff) << 24)))

FUNC_IN_FLASH static uint32_t numToBigEndian(uint32_t n)
{
    uint32_t testn = 0x01020304;
    uint8_t *p = (uint8_t *)&testn;
    static uint8_t isBe = 3;
    if(isBe == 3)
    {
        if(p[0] == 0x01)
        {
            isBe = 1;
        }
        else
        {
            isBe = 0;
        }
    }
    if(isBe)
    {
        return n;
    }

    return SWAP(n);
}

FUNC_IN_FLASH int AesCTREncrypt(const unsigned char *in, unsigned char *out, int len,
                                const unsigned char *key, int keylen/*, unsigned char *iv*/)
{
    int i;
    int diffLen;
    int cryptLen = 0;
    uint8_t cryptBuf[16];
    //0,1,2->nounce, 3->counter
    uint32_t iv32[4];
    uint32_t counter = 0;

    memcpy(iv32, iv, 16);
    setKey(key);

    while(cryptLen < len)
    {
        iv32[3] = numToBigEndian(counter);

        diffLen = len - cryptLen;
        diffLen = diffLen > 16 ? 16 : diffLen;

        AES128_ECB_encrypt((uint8_t *)iv32, cryptBuf);
        for(i = 0; i < diffLen; i++)
        {
            out[cryptLen + i] = cryptBuf[i] ^ in[cryptLen + i];
        }

        counter++;
        cryptLen += diffLen;
    }
    return cryptLen;
}

FUNC_IN_FLASH int AesCTRDecrypt(const unsigned char *in, unsigned char *out, int len,
                                const unsigned char *key, int keylen/*, unsigned char *iv*/)
{
    return AesCTREncrypt(in, out, len, key, keylen/*, iv*/);
}

//ECB
FUNC_IN_FLASH int AesEncrypt(const unsigned char *in, unsigned char *out, int len,
                             const unsigned char *key, int keylen)
{
    int cryptLen = 0;
    int diffLen;
    uint8_t cryptInBuf[16];
    uint8_t cryptOutBuf[16];

    setKey(key);

    while(cryptLen <= len)
    {
        diffLen = len - cryptLen;
        //??16?????????? //??PKCS5
        if(diffLen < 16)
        {
            memset(cryptInBuf, 16 - diffLen, sizeof(cryptInBuf));
            memcpy(cryptInBuf, in + cryptLen, diffLen);
            AES128_ECB_encrypt(cryptInBuf, cryptOutBuf);
            memcpy(out + cryptLen, cryptOutBuf, 16);
        }
        else
        {
            AES128_ECB_encrypt((uint8_t *)in + cryptLen, out + cryptLen);
        }
        cryptLen += 16;
    }
    return cryptLen;
}

FUNC_IN_FLASH int AesDecrypt(const unsigned char *in, unsigned char *out, int len,
                             const unsigned char *key, int keylen)
{
    int cryptLen = 0;
    int pkcs5Num;

    setKey(key);
    while(cryptLen < len)
    {
        AES128_ECB_decrypt((uint8_t *)in + cryptLen, out + cryptLen);
        cryptLen += 16;
    }

    pkcs5Num = out[len - 1];
    if(pkcs5Num > 16)
    {
        pkcs5Num = 0;
    }

    return len - pkcs5Num;
}






